Sewing-machine.



J. KORNAS SEWING MACHINE,

"APPLICATION FILED JULY 1, I916.

Patented Feb. 11, 1919.

3 SHEETSS HEET 1.

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J. KORNAS.

SEWING MACHINE.

APPLICATION FILED 1UL'Y1,19!6.

Patented Feb. 11, 1919.

3 SHEETS-SHEET 2.

J. KORNAS.

SEWING MACHINE.v

APPLICATION FiLED1ULYI,l916.

1,293,806., Patented Feb. 11, 1919.

' 3 SHEETS-SHEET 3.

rans arm omen.

JOSEPH KOBN'AS, 0F LINDEN, JERSEY, ASSIGNOR T0 FELDMAN MACHINE WORKS,

INC., A CORPORATION OF NEW YORK.

SEWING-MACHINE.

Application filed July 1. 1916.

To all whom it may concern Be it known that I, JosnPH KoRNAs, a citizenof the United States, and resident of Linden, in the county of Union andState of New Jersey, have invented certain new and useful Improvementsin Sewing-Machines, of which the following is a specification.

My invention relates in general to a sewing machine of the class usuallyused in factory work and particularly relates to the frame and coactingparts of such machines.

It is a usual practice in factory work to have the different sewingmachines constructed with work supporting plates designed to fit theparticular kind of work upon which it is desired to operate. Thispractice, of course, necessitates a separate machine or group ofmachines for each character of work performed and with the known typesof such machines there is but little possibility of adapting all of themachines for their most effective operation thus resulting in some ofthe machines remaining idle for part of the time.

Accordingly one of the objects of my invention is to provide a singlestandard type of sewing machine frame designed to accommodate differentcharacters of work supporting plates, so that one form of machine inaybe utilized to operate economically upon the different characters ofwork performed by the factory. This object may be obtained merely byproviding a standard form of plate supporting bed to the machinestogether with a set of the different characters of work supportingplates usually employed in devices of this character, each platedesigned to fit the standardized bed.

Another object of the invention is to design a sewing machine frame, sothat the space surrounding the work supporting plate or its bed, shallbe substantially free from any projecting parts of the machine, thusinsuring the maximum possible work space beneath the arc or arm, betweenthe machine head and arm-supporting-standard and in advance of and inrear of the work supporting plate or bed.

Incidental to this last mentioned object it is an incidental desideratumto provide a simple form of machine with the actuating mechanism incompact form and mounted to work as close as possible to the worksupporting plate or bed and further to mount Specification of LettersPatent. Patented Feb. 11, 1919.

Serial No. 106.991.

all gages and auxiliary parts so that the space about the worksupporting plate may be substantially maintained clear of anyobstruction to the movement of the material being sewed.

Still another object of the invention is to provide a construction whichwill insure a secure support for the different work supporting plateswhen positioned on the bed and a final object is to provide a simple,compact and inexpensive form of machine of the class described with theleast possible number of additional parts or extra machine Worknecessary to accomplish the objects suggested.

Various other objects and'advantages of the invention will be in partobvious from an inspection of the accompanying drawings and in part willbe more fully set forth in the following particular description of oneform of mechanism embodying my invention, and the invention alsoconsists in certain new and novel features of construction andcombination of parts hereinafter set forth and claimed.

In the drawings:

Figure 1 is a view in horizontal section through the upper frame of themachine and showing the lower portion of the machine designed toillustrate a preferred embodiment of my invention;

Fig. 2 is a front elevational view of the device shown in Fig. 1;

Figs. 3 and 4 are respectively a plan and a front elevational view ofone form of work supporting plate and plate carrying parts shownfragmentarily;

Fig. 5 is an end elevational view looking at the left side of themachine shown in Figs. 1 and 2;

Fig. 6 is a plan view of another form of.

work supporting plate;

Fig. 7 is a transverse sectional view taken on the line 77 of Fig. 6;

Fig. 8 is a perspective view of the supple mental prop shown detachedfrom the manames for convenienceof expression but they are intended tobe as generic in their application to similar parts as the art willpermit.

In the several figures, there is shown a sup.- porting base 12,extending upwardly from one side of which is a standard 13 designed tosupport a head 14 by means of the usual arch arm (not shown). The headcarries a presser foot bar 15 and needle bar 16 actuating the needle 17.A work plate supporting bed 18 projects upwardly from the basel2c0nstitut1ng,an extension thereof and supports the feeder mechanism19. The shuttle 19 of this mechanism is actuated by an ec: centricfeeding shaftQO journaled in the bed 18 and in the base 12.and drivenfrom a hand or pulley wheel 21, all as is usual with devices of thischaracter. The feeding mechanism 19, is operated by a conventional formof feeder actuating mechanism 2 2, including a known form 'of T-shapedfeeder bar 23, but in this disclosuredesigned so that one arm 24 extendsrearward'ly of the bed plate and is pivoted to a rocking frame 25positioned back of the standard 13 and the other arm 26 of which extendsparallel to the length of the machine and relatively close to the bed soto permit a free work space about the bed 18 unobstructed by the feederbar mechamenu as sual with known forms of such evi One or more locatingstuds 28 project upwardly from the flat surface 27 of the bed and thisfiat surface contains one or more screw ho'les 29. Preferably this fiatsurface is of relatively small dimensions in plan, but if desired, thebed may be provided with an extension 30 for the purpose of providing anadditional plate supporting area to the bed. This .bed is designed toreceive any one of a series of work supporting plates, one-of which,known as a cloth plate 31., is shown in Fig. 6. This type of plate isrelatively wide extending in all directions in plan from the sewingmechanism and particularly' designed to support the fiat work fed to thesewing mechanism. Another form of plate identified a throat plate 82,two modificationsof whichare shown in Figs. 3, 4, 5, 10 and 11, isparticularly designed to be used inconnection with round work such ashats. This type of plate is substantially U-Shape in-cBQSS-Section andfits over the bed, as shown more particularly in Fig. 5,. This platehasa material dimension lengthwise of the, machine preferably so as toreach from, the upright standard to a position well beyond the feedingmechanism, as shown in Fig. 4. This type of plate gives a relativelylongcurved working surface well ,known in some types of sewing machines.Plates of this character are usually equipped with some .form of ,gage,one vtype of which is identifiedas a'lininggage 83and is adjustablymounted thereon and set in position by a set screw 34. These worksupporting plates may contain an opening 35 located to have the feedingmechanism project therethrough when in set position on the bed and mayalso contain a needle opening 36 designed to receive the needle on itsdown stroke. The two last named openings may be contained in areplaceable needle plate 38 (Fig. 6) as is usual with some form ofplates of this character. The plates also contain stud apertures 39designed to contain the studs 28 and also contain screw holes 40designed'to register with the corresponding screw holes in the studplate and coactively designed to receive screws 41 for fastening thework supporting plate in its set operative position on the bed. Theplates may also be provided with oil vents 42.

With some types of plates, aS for instance, with the broad flat plateshown in Fig. 6, it is desirable, not necessary, tosupport the same atpoints remote from the support provided by the relatively small bed andfor this purpose the device illustrated is provided with a supplementalprop 43 designed to be moved from an inoperative position, such as thatshown in Figs. 1 and 2, into an operative position engaging theunderside of the plate as shown in Figs; 7 and 9. In the form disclosedthe prop is a wide U-bar, the crotch portion 44 of which is pivotallymounted in the bed and extends transversely of the length-of the machineso as to position the arms 45 some material distance from the bed. Thesearms are designed to be rocked into raised position to support the plateby engaging the underside thereof. If desired, the arms may bedemountably fastened to the plate and for this purpose the plate isprovided with screw holes 46 and the ends of the arms are countersunkand tapped to receive screws 47 inserted from the top of the platethrough the screw holes into the tapped ends of the arms.

By means of a construction of this kind the broad plate may be supportedadjacent its center by the bed and the wide spreading arms may be causedto engage the plate at points remote from the support provided by thebed, thus insuring a. well braced work support free from any rattle orabnormal torsional strains thereon caused by pressure on the plateadjacent its edges. The prop may be secured in its operative, supportingposition, or in its inoperative position moved out of the way, and forthis purposea spring 48 is fastened to the underside of the bed plateand is caused to bear upon one or the other of flat faces 49 or 50formed at an angle to each other in the crotch 44 for the purpose ofholding the arms securely in the position shown in full line or in theposition shown in'dotted lines in Fig. 9.

The throat forms of work supporting plates are frequently provided withmovable types of set guides and gages, two forms of which are shown inFigs. 10 and 11. These figures illustrate one form of edge guide 51 anda common form of braid gage 52. The braid gage illustrated includes arack 53, which in the device illustrated, is designed to mesh with apinion 54: journaled in the bed plate and arranged to be actuatedmanually when in operative engagement with the braid gage.

This pinion and any actuatin mechanism for the same, may be mounte uponthe frame of the machine as a permanent fixture thereto and thedifferent gages used on the supporting plate, or used as separateattachments to the machine, may be standardized so that their movableelements may all be actuated from this pinion carried by the frame.

It will be seen that another feature of this disclosure is to provide astandard form of gage actuating mechanism as a permanent part of themachine proper and to arrange the different gages so that they may fiton the machine and be actuated all from the same actuating mechanism.

A work gage 55 in the form of an L-rod has a long reachinglongitudinally extending stem portion56 slidably mounted in a bracket 57extending rearwardly from the standard 13 and the gage is fastened inposition by a thumb-screw 58 threaded through the bracket and having aworking head 59 accessible from the-front of the machine.

This long gage includes a transversely disposed work engaging finger 60fixed to the forward end of the stem and arranged to engage the work inorder to hold the same in position on the work supporting plate and inposition to be engaged by the sewin mechanism. Supporting this gage inthe standard at one side of the work space permits of a constructionwhereby the gage may be readily moved into inoperative position thuspermitting the free unrestricted space about the work supporting plateor bed characterizing the device disclosed.

In operation it is to be understood that this machine works in a mannersimilar to known machines now on the market, except that for thedifferent character of work to be sewed, the difierent plates now knownmay be inserted on the bed plate which in this form of machine isdesigned toaccommodate these different characters of plates. Byloosening and removing the holding screws the plate in position on thebed may be lifted clear of the studs and another plate may be insertedin place of the removed plate. By resetting the screws in theirpositions in the alined screw holes, the new plate is securely fastenedin position with the feeder opening in proper position uncovering thefeeding mechanism and with the needle opening 36 in position to receivethe needle on its down stroke.

If the character of plate used requires supplemental supports, the propmay be swung from its inoperative position into position engaging theunderside of the plate and if desired, this support may be fastened infixed supporting position. Should a type of plate be used provided witha rack form of setting gage, the rack will be caused to mesh with theactuating pinion and a type of sewing machine will be formed whichutilizes this feeding rack form of gage.

In those cases where the long gage is not needed, it may be grasped withone hand while the set screw is loosened with the other at the front ofthe standard and the gage slid in its bracket into an inoperativeposition or it may be demounted entirely from the machine in each caseinsuring a clear unobstructed space beneath the arms for bulky work fedto the sewing mechanism.

It is obvious that by means of a device of this character a simple form'of machine is provided which will give its maximum available amount ofwork space without interruption by any of the actuating mechanism or bythe gages commonly found in devices of this character. As any number ofwork supporting plates may be designed and arranged to be supported fromthe bed disclosed, it is obvious that as many different machines may beformed as there are different work supporting plates available so thatthe one standard form of machine may be utilized to construct differenttypes of sewing machines.

While I have shown and described, and; have pointed out in the annexedclaims, certain novel features of my invention, it'will be understoodthat various omissions, substitutions and changes in the form anddetails of the device illustrated andin its operation may be made bythose skilled in the art without departing from the spirit of theinvention.

Having fully described my invention, I claim:

' 1. In a sewing machine, the combination with a supporting base and asewing needle, a plate bed projecting from said base and provided with asetting stud and with a screw hole in the face thereof and adapted toreceive one of a plurality of work supporting plates of differentcharacters, provided with a needle receiving opening, with a screw holedesigned when the plate is mounted in position on the base to registerwith the screw hole in the base and also provided with an aperturedesigned to contain the setting stud, said screw holes and said stud andcoacting aperture designed to locate the plate in set position relativeto the needle and its needle receiving opening.

2..In a sewing. machine, the combination of a supporting base, a feederactuating mechanism including an arm positioned close to the base, arelatively small plate bed projecting forwardly from said baseto providea support for a work plate with an unobstructed space about the same andto the outside of the mechanism arm for the material to be sewed, saidplate bed provided with means for demountably attaching a worksupporting plate to said bed and a work supporting plate adapted to bepositioned on said bed and designed to extend into saidunobstructedspace about the bed and' overlapping said mechanism arm.

3. In a sewing machine, a supporting base, a relatively small plate bedprojecting forwardly from said base to provide a support for amaterially larger work plate with an unobstructed space about the samefor the material to be sewed, said plate bed provided with means fordemountably attaching a work supporting plate to said bed.

4. In a sewing machine, the combination with a sewing needle, ahorizontally disposed plate bed, said bed provided with means forlocating a work plate in set position thereon relative to the needle,said bed provided with a small extension for providing an additionalplate supporting area, said extension provided with a screw hole, of aWork plate designed to be positioned on said bed and provided with meansdesigned to coact with the correlated means on the bed and the screwhole in the extension for fastening the plate in position.

5. In a sewing machine, the combination with a sewing needle and asupporting base, said base having a plate bed extending therefrom andpositioned adjacent the needle, said bed provided with means for settinga work supporting plate in position relative to the needle, and asupporting prop carried by the base and designed to be moved from aninoperative position into position to provide a supplemental support forcertain types of work supporting plates carried by the bed.

6. In a sewing machine, the combination with a sewing needle and asupporting base, said base having a plate bed extending therefrom andpositioned adjacent the needle, said bed provided with means for settinga work supporting plate in position relative to the needle, a supportingprop carried by the base and designed to be moved from an. inoperativeposition into position to provide a supplemental support for certaintypes of work supporting plates carried by the bed and means acting onsaid prop for holding the same in-its operative position.

7. In a sewing machine, the combination with a sewing needle and asupporting base, said base having a plate bed extending therefrom andpositioned adjacent the needle,

said bed provided with means for setting a work supporting plate inpositionrelat-ivc to the needle, a U-shaped prop pivoted at its crotchin said base and designed to have its free ends swing up into positionto engage the underside of the work supporting plate thereby to supportthe same at points spaced from the part supported-by the bed.

8. In a sewing machine, means for supporting a Work supporting plate inset position relative to the sewing needle, said means including a platebed designed to support a plate in position thereon and supplementalsupporting means designed to be moved from an inoperative position intoa set position to support a plate positioned on the bed.

9. In a sewing machine, a frame including a supporting base and astandard projecting upward from the base, a relatively long narrow bedextending to one side of said base, feeding mechanism carried by the bedadjacent its free end, actuating mechanism having a portion thereofextending from a position in rear of the upright, parallel to the bedand relatively close thereto for actuating the feeding mechanism, saidclose positioning of the actuating mechanism to the bed providing a freework space about the bed with the least possible interference from theactuating mechanism and a work supporting plate designed to be mountedon the bed to cover the portion of the actuating mechanism adjacent thefeeding mechanism.

10. In a sewing machine, a frame including a supporting base having-aplate bed extending therefrom and designed to carry a work supportingplate provided with movable gage mechanism, a manually actuatedmechanism carried by the frame as a permanent fixture thereof, anddesigned to be operatively connected to the gage mechanism carried bythe work supporting plate.

11. In a sewing machine, a frame including a supporting base carrying aplate bed, 110 a work supporting plate demountably positioned on saidplate bed, a gage for controlling the work material, a manuallycontrolled mechanism carried by the frame as a permanent fixture.thereof, said mechanism 115 designed to be operatively connected to thegage for shifting the same into its several operative positions.

12. In a sewing machine, a frame including a supporting base carrying a.plate bed, 120 a work supporting plate demountably positioned onsaidplate bed, a gage for controlling the work material, said gage includinga rack, a pinion mounted in said frame as a permanent part thereof andde- 125 signed, when the plate is in operative position, to mesh withsaid rack and means for actuating said pinion to move the gage.

13. In a sewing machine a frame including a supporting base carrying aplate bed, 130

a Work supporting plate demountably positioned on said plate bed, a gagefor controlling the Work material carried by the demountable plate, saidgage including a rack, a pinion mounted in said frame as a permanentpart thereof and designed, When the plate is in operative position, tomesh with said rack and means for actuating said pinion to move thegage.

Signed at New York, in the county of 10 New York and State of New York,this 19th day of June, A. D. 1916.

JOSEPH KORNAS.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

. Washington, D. 0.

